INTRODUCTION
The Marco CP-690E Automatic Chart Projector is a wireless remote
controlled unit which provides instantaneous selections of 33 of the
most popular ophthalmic charts used. With programmable random
access capability, the instrument enables you to quickly and easily
program pre-selected slides and present them in a sequence most suited
to your particular refraction needs. Superior masking features and
red/green filtering over any appropriate chart also extends the capability
of the CP-690E. The excellent design in both function and style will
increase the efficiency of your examination procedures, provide you
with state-of-the-art technology, and enhance the decor of your office.
CONTENTS
INTRODUCTION
GENERAL DESCRIPTION........................1
INSTALLATION
Mounting the Projector .........................1
Positioning the Projector .......................1
Positioning the Screen ...........................2
Correct Letter Size and Focusing ...........2
Chart Brightness Adjustment ................2
OPERATION
Using the Remote ..................................3
CARE AND MAINTENANCE
Changing the Bulb .................................4
Changing the Fuse .................................4
Changing the Batteries ..........................4
Setting the Remote Control Code...............4
SPECIFICATIONS......................................5
Chart Samples ..............................................5
1. ON/OFF Switch
2. Infrared Ray
Receiving Window
3. Wireless Remote
4. Top Cover Screw
Figure 1
GENERAL DESCRIPTION
The CP-690E consists of the main Chart Projector body, wireless
remote control, projection screen, test scale, and dust cover. The
table, unit, and wall mounts are optional accessories sold separately.
Please review the brief descriptions associated with Figure 1 to
familiarize yourself with each function.
1. ON/OFF Switch:
The green LED next to the main switch will
be illuminated when the main switch is turned on.
2. Infrared Ray Receiving Window:
Receives the infrared signals
from the wireless remote control unit.
3. Wireless Remote Control:
The hand-held remote control unit
permits total operation of the Chart Projector from anywhere within
the examination room. Maximum range is 25 feet from the projector
to the screen.
4. Top Cover Screw:
The top cover screw allows for removal of the
top cover of the Chart Projector for access to the bulb, focusing and
letter size adjustment knobs, and the remote control code switches.
INSTALLATION
Mounting the Projector
Available options for mounting the CP-690E are a wall, unit, and
table mount. Preferably, the instrument should be mounted at the
same height as the patient’s eyes. If this is not possible, tilt the
instrument slightly so that the projected image on the screen is at
the same height as the patient’s eyes.
Positioning the Projector
Measure the distance from patient to screen (refracting distance) and
mount the Chart Projector within the following projection distance
guidelines:
Refracting Distance
Projection Distance
10 feet
10 - 13 feet
13 feet
13 - 17 feet
16.4 feet
16 - 21 feet
20 feet
19 - 25 feet
To obtain a longer refracting distance in smaller rooms, a mirror
or system of mirrors should be used (Figure 2). A high quality front
surface mirror is recommended to obtain optimal results.
Mirror
Mirror
Screen
Projector
Patient’s eye
Figure 2
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2
3
4
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